Chicago's best-known network TV outpost may be on the verge of shrinking, at least a little.

Entertainment industry publications are reporting that while NBC in recent days has renewed producer Dick Wolf's "Chicago Fire," "Chicago P.D." and "Chicago Med" pantheon, his newest effort, "Chicago Justice," is on the bubble.

A decision on what happens has been put off until the network completes meetings with potential advertisers for next season. "We're still putting the pieces in place for post-Olympics and summer," NBC Entertainment chief Bob Greenblatt told Variety in a conference call with reporters.

Another publication, Deadline Hollywood, said that while "Justice," filmed at the Near Southwest Side Cinespace complex, is the lowest-rated of Wolf's Chicago-made shows, ratings are still higher than for some other dramas NBC already has green-lighted.

"We decided that we didn't need it as there was no space for fall," Greenblatt said of "Justice," adding that a decision on the legal drama's future will be made in "a couple of more weeks," according to Deadline Hollywood.

Late last week, "Chicago Fire," "Chicago P.D." and "Chicago Med" were renewed for their fifth, fourth and third seasons, respectively.

The Wolf shows, along with a few others like Fox's "Empire" (which is set in New York but shot here), have helped power the local film-and-TV production business to record highs, with an estimated $499 million spent in the state last year, according to Illinois Film Office Director Christine Dudley.